c语言学生选课系统

#include
#include
#include
struct stu
{
int num;
char name[20];
char kind[20];
int lhours;
int rhours;
int crdit;
int score;
int term;
}s[1000],t;
int input(struct stu s[]);
int openfile(struct stu s[]);
void output(struct stu s[],int n);
int seqsearch1(struct stu s[],int n,int search_score);
int seqsearch2(struct stu s[],int n,char search_name[]);
void seqinsert(struct stu s[],int *len);
void seqdelete(struct stu s[],int *len);
void revise(struct stu s[],int n);
void sort(struct stu s[],int n);
void save(struct stu s[],int n);
void main()
{
int sel,choice;
int n,*len=&n,i;
int search_score;
char search_name[20];
char message[]={"***********************************************"
"**********************************************\n"
"***********************************************"
"******欢迎使用西安理工大学选课系统************\n"
"本系统是一个学生选课系统，您可以在本系统中实现\n"
"课程信息的输入，浏览，查找，存入，删除，修改，\n"
"排序，保存等操作******************************\n"};
char menu[]={"88888888888888888888888888888888888888888888888888\n"
"88888888888888888888888888888888888888888888888888\n"
" *1.输入课程信息 \n"
" *2.浏览课程信息 \n"
" *3.查找课程信息 \n"
" *4.插入课程信息 \n"
" *5.删除课程信息 \n"
" *6.修改课程信息 \n"
" *7.课程信息排序 \n"
" *8.存盘 \n"
" *9.退出 \n"
"88888888888888888888888888888888888888888888888888\n"};
printf("%s",message);
do
{
printf("%s",menu);
printf("请在1--9中选择\n");
scanf("%d",&sel);
switch(sel)
{
case 1:
printf("1---键盘输入\n");
printf("2---文件载入\n");
printf("请选择1或2\n");
scanf("%d",&choice);
switch(choice)
{
case 1:
n=input(s);
break;
case 2:
n=openfile(s);
break;
}
break;
case 2:
output(s,n);
break;
case 3:
do
{
printf("1----------按照学分查找------\n");
printf("2----------按照课程名查找----\n");
printf("0----------返回上一级菜单----\n");
printf("请选择\n");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("请输入学分\n");
scanf("%d",&search_score);
i=seqsearch1(s,n,search_score);
if(i==-1)

printf("无此学分相应课程");
else
{
printf("8888888888888");
printf("i=%d",i);
printf("查找课程为:\n");
printf("课程编号%d\n",s[i].num);
printf("课程名称%20s\n",s[i].name);
printf("课程性质%20s\n",s[i].kind);
printf("总学时%d\n",s[i].lhours);
printf("授课学时%d\n",s[i].rhours);
printf("实验或上机学时%d\n",s[i].crdit);
printf("学分%d\n",s[i].score);
printf("开课学期%d\n",s[i].term);
printf("--------\n");
}
break;
case 2:
printf("请输入课程名\n");
scanf("%s",search_name);
i=seqsearch2(s,n,search_name);
if(i==-1)
printf("无此课程\n");
else
{
printf("8888888888\n");
printf("查找的课程为");
printf("课程编号%d\n",s[i].num);
printf("课程名称%20s\n",s[i].name);
printf("课程性质%20s\n",s[i].kind);
printf("总学时%d\n",s[i].lhours);
printf("授课学时%d\n",s[i].rhours);
printf("实验或上机学时%d\n",s[i].crdit);
printf("学分%d\n",s[i].score);
printf("开课学期%d\n",s[i].term);
}
break;
case 9:
break;
}
}while(choice!=0);
case 4:
seqinsert(s,len);
break;
case 5:
seqdelete(s,len);
break;
case 6:
revise(s,n);
break;
case 7:
sort(s,n);
break;
case 8:
save(s,n);
break;
case 9:exit(1);
}
}while(sel!=0);
}



void save(struct stu s[],int n)/*保存模块*/
{
int i;
FILE *fp1;
fp1=fopen("d:\\课程系统表.txt","w");
if(fp1==NULL)
printf("保存不成功\n");
else
{
for(i=0;ifprintf(fp1,"%d%20s%10d%d%d%d%d",s[i].num,s[i].name,s[i].kind,s[i].lhours,s[i].rhours,s[i].crdit,s[i].score,s[i].term);
fclose(fp1);
printf("成功保存\n");
}
}
/*输出模块*/
void output( struct stu s[],int n)
{
int i;
printf(" 选修课程信息表 \n ");
printf("\n ");
for(i=0;i<=n-1;i++)
{printf("课程编号%d\n",s[i].num);
printf("课程名称%20s\n",s[i].name);
printf("课程性质%20s\n",s[i].kind);
printf("总学时%d\n",s[i].lhours);
printf("授课学时%d\n",s[i].rhours);
printf("实验或上机学时%d\n",s[i].crdit);
printf("学分%d\n",s[i].score);
printf("开课学期%d\n",s[i].term);
}
}
/*学分查询模块*/
int seqsearch1( struct stu s[],int n,int search_score)
{
int i=0;
for(i=0;i<=n-1;i++)
if(s[i].score==search_score)
return i;
}
/*课程名查询模块*/
int seqsearch2( struct stu s[],int n,char search_name[])
{
int i=0;
for(i=0;i<=n-1;i++)
if(strcmp(s[i].name,search_name)==0)

return i;
}
/*修改模块*/
void revise( struct stu s[],int n)
{
int k,choice;
char kname[20];
do
{
printf("1**********按课程名称修改*******\n");
printf("0***********返回上级菜单 ***********\n");
printf("请输入选择\n");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("请输入要修改的课程名称\n");
scanf("%s",&kname);
k=seqsearch2(s,n,kname);
if(k==-1)
printf("修改无效\n");
else{
printf("课程编号");
scanf("%d",&s[k].num);
printf("课程名称");
scanf("%20s",&s[k].name);
printf("课程性质");
scanf("%20s",&s[k].kind);
printf("总学时");
scanf("%d",&s[k].lhours);
printf("授课学时");
scanf("%d",&s[k].rhours);
printf("实验或上机学时");
scanf("%d",&s[k].crdit);
printf("学分");
scanf("%d",&s[k].score);
printf("开课学期");
scanf("%d",&s[k].term);
printf("修改成功!\n");

}
break;
case 0:
break;
}
}while(choice!=0);
}
/*删除模块*/
void seqdelete( struct stu s[],int *len)
{
int j,delete_score,k,choice;
char delete_name[20];
if(*len==0)
printf("数组以空");
else
{
do
{
printf("1*********按课程名删除*****\n");
printf("0*********返回上级菜单*****\n");
printf("请输入选择\n");
scanf("%d",&choice);
switch(choice)
{
case 1: printf("请输入删除课程的课程名：");
scanf("%s",delete_name);
k=seqsearch2(s,*len,delete_name);
if(k==-1)
printf("无效的删除位置\n");
else
{
for(j=k+1;j<=*len-1;j++)
s[j-1]=s[j];
(*len)--;
printf("删除成功");
}
break;
case 0:
break;
}
}while(choice!=0);
}
}
/*输入模块*/
int input( struct stu s[])
{
int i=0,n=0;
printf("输入课程编号(为-1时结束)");
scanf("%d",&s[i].num);
while(s[i].num!=-1)
{
printf("课程编号");
scanf("%d",&s[i].num);
printf("课程名称");
scanf("%20s",&s[i].name);
printf("课程性质");
scanf("%20s",&s[i].kind);
printf("总学时");
scanf("%d",&s[i].lhours);
printf("授课学时");
scanf("%d",&s[i].rhours);
printf("实验或上机学时");
scanf("%d",&s[i].crdit);
printf("学分");
scanf("%d",&s[i].score);
printf("开课学期");
scanf("%d",&s[i].term);
i++;
n++;
printf("输入课程编号(为-1时结束)");
scanf("%d",&s[i].num);
}
return n;
}
/*排序模块*/
void sort( struct stu s[],int n)
{
int i,j,k;
for(i=0;i{
k=i;
for(j=i+1;jif(strcmp(s[k].name,s[j].name)>0)

k=j;
if(i!=k)
{
t=s[k];
s[k]=s[i];
s[i]=t;
}
}

}
/*插入模块*/
void seqinsert( struct stu s[],int *len)
{
int j,k,choice;
int insert_num;
char insert_name[10];
char insert_kind[20];
int insert_ltime;
int insert_stime;
int insert_sjtime;
int insert_score;
int insert_term;
struct stu cr ; /*新数组*/
if(*len==1000-1)
printf("数组已满！");
else
{
do{
printf("1**********按课程名称插入*******\n");
printf("0***********返回上级菜单 ***********\n");
printf("请输入选择\n");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("请输入插入位置(插入某课程名之前)\n");
scanf("%s",&insert_name);
k=seqsearch2(s,*len,insert_name);
if(k==-1)
printf("位置无效、\n");
else{ printf("课程编号");
scanf("%d",&cr.num);
printf("课程名称");
scanf("%20s",&);
printf("课程性质");
scanf("%20s",&cr.kind);
printf("总学时");
scanf("%d",&cr.lhours);
printf("授课学时");
scanf("%d",&cr.rhours);
printf("实验或上机学时");
scanf("%d",&cr.crdit);
printf("学分");
scanf("%d",&cr.score);
printf("开课学期");
scanf("%d",&cr.term);
for(j=*len-1;j>=k;j--)
s[j+1]=s[j];
s[k]=cr;
(*len)++;
printf("插入成功\n");
}
break;
case 0:
break;
}
}while(choice!=0);
}
}
/*载入模块*/
int openfile(struct stu s[] )
{
int i=0;
FILE *fp2;
fp2=fopen("d:\\课程系统表.txt","r"); /*打开D盘"课程系统表"文件*/
if(fp2==NULL)
{
printf("找不到文件\n");
return 0;
}
else
{
while(!feof(fp2))
{
fscanf(fp2,"%d%s%s%d%d%d%d%d");
i++;
}
fclose(fp2);
printf("数据写入\n");
return i;
}
}